NVM is a tool which handles multiple versions of Node.js. NVM allow us to install multiple version of the Node.js and maintains them. We can choose whichever version of the Node.js we want and go back to the default with the help of NVM.

Create folder based navigation or permalink in static site as well with Handlebars templating. We can write a automation script to do it in grunt/gulp with Handlebars script. To do this we will have to create a folder name same as the file and then create a index.html or default.html file in it.

Email harvesting means fetching email addresses by crawling web pages using various scripts/softwares. These email addresses then used for sending bulk marketing emails or newsletters/spams. There are lots of softwares/bots available in the market which crawls the website and gives email address from its pages. These softwares are generally known as "Harvesting Bot".